Overall employment is projected to increase about 14 percent during the 2010-2020 decade with more than half a million new jobs expected for each of four occupations-registered nurses, retail salespersons, home health aides, and personal care aides; occupations that typically need postsecondary education for entry are projected to grow faster than average, but occupations that typically need a high school diploma or less will continue to represent more than half of all jobs